Cold hardiness of some relatives of hexaploid wheat

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Abstract
One hundred and sixty-one accessions, from species which share a common genome with hexaploid wheat (Triticum aestivum E., ABD genome), were rated for cold hardiness following acclimation under fall field conditions. These accessions were from the species T. tauschii (Coss.) Schmal. (D genome); T. monococcum. L., and T. boeoticum Boiss. (A genome); and T. dicoccum Shrank and T. dicoccoides Korn. (AB genome). Accessions from T. tauschii survived the coldest temperatures and had a hardiness level which approached the hardiest hexaploid wheats. The most hardy A genome accessions survived temperatures comparable to hexaploid wheats with low cold hardiness potentials. The remainder of the A and the AB genome wheats were relatively unhardy.